Pumping Solution for Southern Nevada Water Authority

In 2008, Southern Nevada Water Authority (SNWA) sought a pumping solution to mitigate water supply issues during persistent drought conditions, which had lowered Lake Mead’s water elevation. SNWA developed requirements for three pumps, each unit designed to provide a minimum of 20,000 gallons per minute (gpm) at 450 feet of total dynamic head (TDH) for adequate transmission of water from Lake Mead to its treatment facilities.

SNWA joint ventured with ANDRITZ into engage in a research and development project looking at the latest technology for a pumping solution. The focus quickly turned to ANDRITZ Heavy Duty Mining (HDM) pumps as the solution that would provide long-term reliability and a fit-for-purpose design. The final pumping solution included three engineered HDM pumps with production capacities of 24,000 gpm at 492 feet of TDH. These pumping units utilized the world’s first six-pole 13 kV submersible motor, which produced 2,800 kw or 3,754 hp at 1,200 rpm.

Based on the original requirements, the joint venture exceeded the expectations through a well-planned engineering, design, and development program. SNWA received the latest in technology while being rewarded with highly reliable, very efficient and extremely stable pumping equipment.

Of particular note was the reduction in noise levels compared to the original pumping assemblies, with the new equipment having only a subtle audible level during operation. The reduction in noise naturally reduces a potential workplace hazard.

To date, all of the equipment installed has operated as designed without any post-­warranty maintenance issues. The research and development joint project resulted in the successful design of equipment meeting the current and future needs of SNWA and its subscribers. The equipment by ANDRITZ continues to be a standard to achieve within the water industry and pump market.

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